96
Troubleshooting (Advanced)
• Wireless LAN power supply
If is displayed on the notification area, slide the wireless switch to the right (ON).
• IEEE802.11a settings
Even if the wireless LAN is on, IEEE802.11a may be set to disable. If IEEE802.11a is to
be used, change this setting to enable. (Î page 65)
z This computer uses channels 1 through 11
*4
when using IEEE802.11b/g. Check the channel being used by the access
point.
*4
In the case of wireless communications, the frequency band being used can be divided into segments, so that different communications
can be conducted on each band segment. A “Channel” refers to the individual frequency bandwidth divisions.
Cannot communicate with the access point
z Using the following procedure, confirm whether the computer’s protocol settings are correct (only when using TCP/IP).
A When is displayed on the notification area:
Right-click , and click [Open Network Connections].
When is not displayed on the notification area:
Click [start] - [Control Panel] - [Network and Internet Connections] - [Network Connections].
B Right-click [Wireless Network Connection], and click [Properties] - [General] - [Internet Protocol (TCP/IP)] -
[Properties].
C Confirm the protocol settings, such as IP address, and do the settings properly again.
z Depending on the access point and settings, access may not be accepted unless the computer’s MAC address is regis-
tered beforehand. In this case, check the computer’s MAC address (Î page 95) and register it according to the operat-
ing instructions of the access point.
The communications speed is low
z Communication speed may decrease if, aside from the access point to which this computer is connected, there is another
access point nearby using the same channel or a similar channel. Change the channel on the connection access point,
and check to see if the speed recovers. Confirm method for changing channels using the access point manual.
z The communications speed may be reduced for the following reasons. Shorten the distance between the computer and
the access point.
• IEEE802.11g or IEEE802.11b may be affected by a microwave oven or similar, reducing the communications speed
while the microwave oven is in operation.
• IEEE802.11a is more susceptible to interference than IEEE802.11g or IEEE802.11b, and therefore the communications
speed may be reduced if there is a wall between the computer and the access point or if the computer is further away.
Wireless Switch
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